Petehij



(No Model.) 4 Sheets-Sheet l.

4 Sheets-Sheet 2.

(No Model.)

G. PIETZKA.

REGENBRATNB GAS PURNAGE.

No. 389,009. Patented Sept. 4, 1888.

INVENTR:

BY l

WITNESSES:

ATTORNEYS.

(No Model.) 4 Sheets-Sheet 3.

G. PIETZKA.

REGENERATIVB GAS FURNAGB.

(No Model.) 4 Sheets-Sheet 4.

G. PIETZKA.

REGBNERATIVE GAS FURNAGE. No. 389,009. Patented Sept. 4, 1888.

INVENTQB:

ATTORNEYS.

WITNBSSES llrvr'rnn Sterns Parent* @erica GOTTFRIED PIETZKA, OF WITKOWITZ, MORAVIA, AUSTRlAHUNGARY.

REGENERATIVE GAS-FURNACE.

SPECIFICATION forming part of Letters Patent No. 389,009, dated September 4, 1888.

Application tiled March Qi, 1888. Serial No. 267,939. (No model) To @ZZ whom it may concern:

Be it known that I, Gorrnnrnn Pinrzitn, a subject of the Emperor of Austria, residing at lVitkowitz, Moravia, Empire of Austria, have invented nenT and useful Improvements in Regenerative Gas-Furnaces, of which the following is a specilication.

The object of the invention is to provide a new and improved gas-furnace applicable to all reverbcratory furnaces used for smelt-ing pig metal, reheating, paddling, or other purposes.

The invention consists of gas-generators located directly at one`cnd of the furnace and connected with the same, and of regenerators provided vwith reversing-valves and connected with the ends of the furnace, so that the Waste gases pass through the regenerators, after which the air from the outside is passed through the regcnerators and into the furnace in connection with the gases from the generators.

The invention also consists of certain parts and details and combinations of the same, as will be iully described hereinafter, and then pointed out in the claims.

Reference is to be had to the accompanying drawings, 'forming a part of this specification, in which similar letters of reference indicate corresponding` parts in all the iigures.

Figure l. is a longitudinal sectional elevation ot' the improvement as applied to a pudtiling-furnace. Fig. 2 is a vertical crosssection ofthe same on the line :v .tot Fig. l. Fig. 3 is a sectional plan view with parts broken out. Fig. l is an enlarged transverse section of the reversing mechanism. Fig. 5 is a plan view of the reversing mechanism, and Fig. 6 is an end elevation of the same.

The gas-generators A and A', of any approved construction, are preferably built only on one end of the furnace, and are charged with coke or other fuel, and into which a hot or cold air blast is sent. For practical purposes l prefer to employ two generators in order to obtain a constant gas supply which is not affected by stoking. For working puddlingfurnaces ordinary coal may be used. The generators work with a comparatively small depth of fuel-about sin feet. The gases of the incl are slaked by means ol limestone added to the fuel, and the liquid slag is drawn ott' Without material difficulty at the lowest point, a.

(See Fig. l.)

The generators A and A' are connected by the narrow channel A2 with the settling or cleaning chamber B, located directly above the generators A and A', and serving to collect a considerable quantity of dust carried upward with the gases passing through the channel A2. This dust can be easily removed While the furnace is in operation through the doors located at the outside. The settlingchamber B connects by a narrow opening with the channel C, leading to the hearth E, connected with a second or direct heating-hearth, F, both being of any approved construction. Into the channel C discharges the vertical channel D, supplying the necessary amount of hot air for the combustion ot the gases on the hearths E and F.

The hearth F connects at its rear end with the due or channel G, provided with ttvo horizontal valves, H and H', made of ire-clay and adapted to connect said channel G alternately with the hot-air regcnerators L an d L', located at the sides of the furnace below the door, as shown in Fig. 2. The waste gases are passed through one of the regenerators, While the air necessary for combustion on the hearths Eand F passes through the other regenerator, which had previously been heated to about S000 centigrade by the Waste gases. Each of the regenerators L and L' is of any approved construction, consisting, principally, ofthe chambers N and N', respectively filled in the usual manner with iire-brick. as shown in Fig. 2, and of the tlues O and O', respectively, which, with the chambers N and N', are also heated by the Waste gases.

The regenerators L and L are provided with the valves K J and K J', respectively, made of suitable refractory material, and each hav ing one passage-Way, as is plainly shown in Fig. 3. Between the two valves K and J and K and J' is located the chimney M or M. Fines h lead to the valves K and K from the out-side, so as to admit the necessary atmospheric air. fVhen the valve H is open, the valve H' is closed, as shown in Fig. 3, and the valves K J and K J' are in the position indicated in the same ligure. Then the Waste gases from the hearth F pass into the regenerator L and through the chamber-hT and the channel O, and from the lat-ter through the valve J to the chimney M, and from the chamber N through the valve K also to the chimney M. The air necessary for combustion passes through the channel N2 and through the valve K into the chamber N of the regenerator L, which had been previously heated in the same manner as the regenerator L, above described. The air passing through the chamber N gets heated and passes at its rear end under the valve H into the channel O', and from thclatter through the valve J into the channel D, from which it passes upward and mingles in the channel C with the gases from the gas-generators A and A. The mixture of gases and air is then ignited on the hearth E and utilized in the usual manner, then passes to the other hearth, F, and from the latter the waste gases pass to the regencrator L, as above described. When the temperature of the regencrator L sinks below a certain degree, the valves H and H are reversed, and the valves K J and K J are likeh wise reversed by the mechanism illustrated in laway to the chimney, the temperature then` Figs. 4, 5, and 6. The cold air from the outside then passes through the channel N2 and the valve K into the chamber N of the heated regenerator L, and from the said chamber N to the channel O, the valve J into the channel D, and is used in the same manner as above described in reference to the air heated by the regenerator L. I he waste gases from the hearth F pass into the channel G and to the channel O and the chamber N, and from the latter through the valves K and J to the chimney M.

By building the gas generators A and A directly under the furnace, I gain the advantage that the initial heat of the gases is not lost, the gases passing into the furnace at a temperature at about 600 centigrade. By this means the additional heating of the gases is rendered unnecessary, and the entire heat of the Waste gases can be utilized for heating the air-supply, and the half of the Waste gases need not be used, as heretofore, for heating the gases from the generators Aand A. This is an essential difference, and at the same time a considerable advantage, as compared with the usual heating arrangements. It will also be seen that no conduit-pipes for the gases are employed, and consequently also all inconveniences usually encountered by the use of such conduits-such as deposits oi' tar, &c.-are obviated. The escaping gases are divided in the ilue G in such a manner that the greater part passes through the respective chamber N or N', While the remainder passes through the flue O or O of the regenerators L and L. The heat is almost all taken up from the gases as they pass being only about 250 centigrade.

The position of the two valves K and J or K and J of the regenerators L or L is the same While the furnace is at Worlc-that is, at right angles to the positions of those of the other regenerator. After changing the directions of the currents, the positions of the valves H and H in the flue G and the positions ofthe valves J K and J Kare reversed.

The four valves K J and K J are counterbalanced by Weights P, carried by levers, which are for this purpose slightly raised out of their casings by means of a set of levers, R, S, and T, worked by hand, and then the valves are turned at an angle of ninety degrees by another set of levers, U, V, and W, after which they are again lowered by means of the first set oflevers. This operation is effected in an extremely short time.

If the furnace is put out of action for repairs or other purposes, the heat in the regeneri ators L and L can be kept up at a small expenditure of fuel, so that when the furnace is again put in action both regenerators L and L are ready for use at once. For this purpose I provide a valve, x, made of tire-clay and located in the channel C. When this valve x is closed, the channels O and O are cut off` by suitable means, and after suitably adjusting the valves K, J, J, and K, and partly closing the valves H and H', then the heat from the generators A and A passes through the channel Dinto the channels O O', and from thelatter to the chambers N and N of the regenerators L and L.

A reverberatory furnace provided with this heating arrangement exceeds considerably in its capabilities the existing constructions of furnaces, with no less consumption of fuel,and the Wear is reduced to a minimum, ranging between one-half and one and a half per cent.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. In a furnace, the combination, with gasgenerators discharging into the front ends of the hearths, of air-regenerators located at the sides of the hearths and connected with the latter at their rear ends, said regencrators discharging heated air alternately into the front ends of the hearths, so that the gases from the generators are mixed with the heated air from the regenerators, substantially as shown and described.

2. In a furnace, the combination, with one or more hearths connected with each other, of a gas-generator discharging into the front end of the first hearth, air-regenerators located at the sides of the hearths, connected alternately with the rear ends of the last hearth, discharging heated air alternately into the front end of the first hearth, whereby the gases from the generator are mixed with the heated air of the regenerators before entering the hearths, substantially as shown and described.

3. In a furnace, the combination, with one or more hearths connected with each other, of a gas-generator discharging into the front end of the first hearth, air-regenerators located at the sides of the hearths, valved channels for establishing communication alternately between the last hearth and the rear ends of said regenerators,and reversing-valves lo` cated in channels in each of the regenerators to permit outside air to pass alternately ICO IOS

IIO

through the said regenerators and to the front end ofthe first hearth, substantially as shown and deserihed.

4. ln a furnace, a gas-generator, a hearth into the front end of which said generator discharges, air-regenerators at opposite sides of the hearth, valved channels leading from the rear ends of the hearth into the rear ends of the regenerators, return-lines leading from the rear ends of eaeh regenerator to the front end of each hearth, an air inlet and outlet at the front ends ofthe regenerators, and Valves controlling the return-channel and said air inlet and oni-let channel, substantially as set forth.

5. The eonibination,with the gasgenerating furnace and the hearth, into the front end of which said furnace discharges, of two air-regenerators at opposite sides ofthe hearth, and having valred channels at their rear ends connnnnieating with the rear end of the hearth, return-dues leading from their rear ends to the front ends of said hearth, inletchan nels at their front ends, channels crossing and connecting said inlet-ehannels and returnilnes, valves at the juncture of said channels and ihres, and the outlets in said crossing-fines between the valves, substantially as set forth.

6. The combination, with the gas-generating furnace, the hearth in front thereof, the nter- 3o leading from the rear end of the hearth into 35 the rear ends of the regenerators, return-fines leading from said channels beyond their valves to the said vertical air-channel, air inlet and outlet channels at the front ends of the :re-

generators, and the reversing-Valves for alter- 4o nately closing the inlet-channels andv directing the air from the regenerators to the outlets and valves for alternately directing the air of the retnrn-flnes to the said outlets and vertical air-inlet, and a reversing mechanism for said i5 valves, substantially as set forth.

In testimony whereof I have signed my naine to this specification in the presence of two subscribing Witnesses.

GO'lTFRiED PIETZKA.

W'itnesses: u

F. HADCKH 1', EDMUND JUssEN. 

